What action should a pilot take if their DME fails at FL240?

When a pilot experiences a failure of their Distance Measuring Equipment (DME) at Flight Level 240, the correct action is to notify Air Traffic Control (ATC) of the failure and continue to the next airport of intended landing where repairs can be made. This approach allows the pilot to maintain situational awareness and adhere to the flight plan while ensuring the safety of the aircraft and passengers.

Continuing to the next intended airport is often practical as it allows for effective management of flight resources and minimizes unnecessary diversions, especially if the flight is otherwise proceeding safely. Notifying ATC of the DME failure ensures that air traffic controllers are aware of the situation and can provide any necessary assistance, such as updates on air traffic or potential runway conditions at the destination.

In contrast, diverting to the nearest airport may not always be necessary unless the failure impacts flight safety or operational capabilities significantly. The pilot's decision to proceed to the intended airport provides options for landing and allows for repairs at a location where all services are available if needed. Thus, maintaining the intended flight path while keeping ATC informed showcases prudent decision-making in aviation operations.